He can be correct and not talk about Dallas. There is very little reason to discuss a franchise having no appreciative reverence. He should not devote any time for the Cowboys in any of his segments. Instead, he should wait until the team meets his definition of reverence. Then he would have a logical reason to speculate what happened that turned things around.
That will never happen though. Cowherd is one of, if not the, top paid sports talking heads. Fox Sports made certain of that. The network and he are voluntarily compelled to devote conversation about the franchise to retain a significant percentage of his audience and maintain his market share.
Even so, I would be surprised if Cowherd or any of his peers would ever take their slant to the next level. I am certain the rest of the league's fans would not miss listening to their almost daily heehawing about the Cowboys. It would allow more time devoted to talking about their franchises instead.